While Corsairís earlier external water cooling kit "The HydroCool 200" was
quite bulky, the Nautilus 500 is much more compact, streamlined, and lighter.
Made of plastic, the central unit looks very neat and clean. The high density
polyethylene reservoir can be seen from the front, which glows green when
powered. A metal filler cap is used on the top, as well as a 120mm exhaust fan
with protective grill. The rear of the unit is also clean, with inlet and
outlet quick connect ports, power cable and fan speed selector switch